Great Lakes nearshore forecasts are subdivided by zone, each identified by a text description and a Universal
Generic Code (UGC). The different colors used in the map above have no meaning and are only intended to assist in differentiating the zones.

Great Lakes nearshore marine forecasts are issued throughout the boating season, typically beginning
around April 1 and ending around December 31, dependent on ice conditions on the entrances to
each individual lake. During periods of climatological extremes leading to erratic ice coverage patterns
(shifting of ice edge, late/early freeze, etc.), and based on customer needs, nearshore forecasts
may be issued throughout the winter to support the National Weather Service mission of protecting life and
property on the waters of the Great Lakes.

NOTICE - Check time and date of forecasts. Linked data may not represent the latest forecast. The Internet is not part of the National Weather Service's operational data stream and should never be relied upon as a means to obtain the latest forecast and warning data. Become familiar with and use other means such as NOAA Weather Radio to obtain the latest forecasts and warnings. Please read our DISCLAIMER

Visit the Marquette, MI Forecast Office which provides links to additional products as well as regionally focused information such as point-specific marine forecasts, predicted tides and buoy observations.